PB Motor Tech BMT 4.5 CFM Vacuum Pump with Brass Manifold Gauge Set — 37.5 micron Ultimate Vacuum, Reinforced Aluminum

PB Motor Tech BMT 4.5 CFM vacuum pump with a brass manifold gauge set is a ready-to-use HVAC service kit that pulls deep vacuums and provides durable, easy-to-read gauges and hoses for refrigeration and A/C maintenance.

This all-in-one kit combines a single-stage 4.5 CFM vacuum pump with a reinforced aluminum housing and a solid-brass manifold gauge assembly, giving technicians and informed DIYers the tools to evacuate refrigerant lines and measure system pressures. The set ships with three color-coded 4-foot hoses, two 1/4" straight quick couplers, and extra-large rubber-coated gauge dials—designed to be rugged, portable, and straightforward to operate. Note: the pump is shipped without oil; #32 or #68 vacuum pump oil is required before use.

How deep can the pump evacuate an A/C or refrigeration system?

The single-stage motor delivers 4.5 CFM and is capable of drawing systems down to about 5 Pa (37.5 microns) under proper conditions. This depth is sufficient for most automotive and household HVAC service tasks to remove non-condensables and moisture.

• Flow rate: 4.5 cubic feet per minute (CFM)
• Ultimate vacuum: approximately 5 Pa / 37.5 microns
• Motor: 1/3 HP single-stage
• Requires addition of #32 or #68 vacuum pump oil before operation

What features do the manifold and hoses offer for safe, accurate work?

The manifold is machined from solid brass for longevity and corrosion resistance while the gauges include large rubber-coated dials and a sight glass to help you read conditions quickly and protect the instrument. Three color-coded hoses (high, low, charge) with quick couplers let you connect and isolate service ports efficiently.

• Brass manifold body for durable, leak-resistant connections
• Extra-large rubber-coated gauge dials for easier reading
• Sight glass in manifold helps observe refrigerant flow and moisture
• Color-coded 4 ft hoses rated 500 psi working / 2500 psi burst pressure

How is the pump built for stability, maintenance, and portability?

The pump housing uses reinforced aluminum alloy for improved heat dissipation and corrosion resistance, while a round sight glass on the oil tank makes oil level checks simple. A nonslip handle and rubber feet reduce vibration and make moving the unit safer on the job.

• Reinforced aluminum alloy housing for cooling and durability
• Oil sight glass for quick visual maintenance checks
• Inlet filter to prevent oil backflow and protect internal components
• Rubber-bottom feet and nonslip handle for steady placement and transport

Which refrigerants and service scenarios is this kit compatible with?

The manifold and pump are compatible with common refrigerants used in automotive and residential systems, making the kit flexible across a range of maintenance tasks. It’s suitable for evacuations, leak checks, and recharge preparation when used with the correct oils and procedures.

• Compatible refrigerants: R134a, R12, R22, R502
• Ideal for automotive A/C and domestic HVAC servicing
• Hoses and couplers included—no immediate need for spare fittings
• Suitable for both knowledgeable DIYers and professional technicians

Who is this for? If you perform routine A/C or refrigeration maintenance—whether as a mobile technician, a garage-based mechanic, or a hands-on homeowner—this PB Motor Tech BMT kit offers a compact, dependable solution for evacuating systems and reading pressures. It’s especially helpful where portability, durability, and clear gauge visibility matter. Remember to add the recommended vacuum pump oil before first use and follow safety procedures for refrigerant handling and system service.